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最新の出版物と天体物理学に関する特許

天体物理学

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これは、天体物理学に関する世界中の英語の出版物と特許の最新のセレクションです。多くの科学オンラインジャーナルの中から、天体物理学、中性子星、超新星、ブラックホール、宇宙マイクロ波、CMBR、クエーサー、赤方偏移、降着円盤、暗黒物質、宇宙インフレーション、磁気流体力学、暗黒エネルギー、ハッブル、事象の地平線、重力波、系外惑星、赤色巨星、白色矮星、赤方偏移といったテーマに分類され、焦点を絞っています。

Accretion disk and gravitational hardening models for layered cognitive manifolds in persistent cognitive machines

Patent published on the 2026-04-16 in US under Ref US20260105260 by ATOMBEAM TECHNOLOGIES INC [US] (Galvin Brian [us])

Abstract: Systems and methods for persistence of memory on a persistent cognitive machine (PCM) that uses a continuous, differentiable, cognitive manifold in geometric space to allow a computer to engage in human-like thought processes. A PCM with cognitive manifold performs cognition on a thought manifold in a continuous, differentiable, thought manifold in geometric space as opposed to probabilistic prediction in a discontinuous, anisotropic, and topologically fractured vector space. A means for providi[...]


Our summary: The content discusses a model for persistent cognitive machines that utilize a continuous cognitive manifold for human-like thought processes. It contrasts this with traditional probabilistic methods, emphasizing a structured approach to thought layers. The model draws parallels with astrophysical concepts to explain the stability of thoughts within the cognitive framework.

Cognitive Manifold, Persistent Cognitive Machine, Accretion Disk, Gravitational Hardening

Patent

Wide-mass-scanning-range setup and phase-resolved protocol for axion dark matter detection

Published on 2026-02-16 by Audrey Cottet and T Kontos @IOP SCIENCE

Abstract: We propose a paradigm for quantum enhanced axion dark matter search, which does not rely on power measurements. We propose to measure directly the axion amplitude and phase in an interferometric protocol at the quantum limit, using a non-linear cavity. In addition, we introduce gyromagnetic modes as wide mass range transducers for axion signals compatible with standard haloscope designs. We expect this scheme to offer an improvement of at least 4 orders of magnitude in figure of merit and at lea[...]


Our summary: The proposed setup enhances axion dark matter detection without relying on power measurements. It utilizes an interferometric protocol to measure axion amplitude and phase at the quantum limit. The introduction of gyromagnetic modes as transducers is expected to significantly improve detection capabilities across a wider mass range.

axion dark matter, quantum enhanced search, interferometric protocol, gyromagnetic modes

Publication

The Role of the Magnetic Field Orientation and Strength on the Electrodeposition of Ni-Fe Bifunctional Electrocatalyst for Hydrogen Evolution Reaction and Oxygen Evolution Reaction

Published on 2026-02-03 by Safya Elsharkawy, Mateusz M. Marzec, Piotr ?abi?ski @MDPI

Abstract: Ni&amp;ndash;Fe alloys were prepared via electrodeposition from a citrate electrolyte under different magnetic field (MF) strengths (0.1 T, 0.3 T, and 0.5 T) and configurations parallel (B&amp;#8214;) and perpendicular (B&amp;perp;) to the electrode surface. The magnetohydrodynamics (MHD) induced by the magnetic field influences their structural, compositional, and electrocatalytic properties. The application of an external homogeneous magnetic field significantly altered the alloy m[...]


Our summary: The study investigates how magnetic field orientation and strength affect the electrodeposition of Ni-Fe alloys. Results show that moderate magnetic field intensity improves film quality and electrocatalytic performance for hydrogen and oxygen evolution reactions. The findings highlight the potential to optimize bifunctional electrocatalysts through controlled magnetic field conditions.

Electrodeposition, Magnetic Field, Ni-Fe Alloys, Electrocatalysis

Publication

Study on Thermophysical Properties and Electrical Conductivity Characteristics of Combustion Products from Propellants with Ionization Seeds

Published on 2026-01-15 by Chunlin Chen, Lei Chang, Baoquan Mao, Qijin Zhao, Renbin Li, Xianghua Bai @MDPI

Abstract: Detailed knowledge regarding the thermophysical properties and electrical conductivity of the combustion products derived from solid propellants is essential for the optimized design and operation of solid-fuel rocket engines employing magnetohydrodynamic drive technology. However, the high-temperature and high-pressure environment prevailing during rocket operation makes the experimental measurement of these characteristics extremely difficult, while the ionization reactions obtained by adding [...]


Our summary: This study focuses on the thermophysical properties and electrical conductivity of combustion products from solid propellants with ionization seeds. It utilizes a Gibbs free energy constraint function and Lennard-Jones potential theory to calculate specific heat, viscosity, and thermal conductivity. The numerical calculations are validated through experiments, showing a discrepancy of less than 5% in electron density at high temperatures.

thermophysical properties, electrical conductivity, combustion products, ionization seeds

Publication

Eigenvalues of the Operator Describing Magnetohydrodynamic Problems in Outer Parts of Galaxies

Published on 2026-01-15 by Evgeny Mikhailov, Tatiana Khasaeva @MDPI

Abstract: The magnetic field generation studies in astronomy lead to a number of interesting problems in mathematical physics. In the dynamo theory, the problem is reduced to a system of parabolic equations for the field components. Assuming that the field grows exponentially, we obtain an eigenvalue problem for the corresponding elliptic operator. The possibility of the field generation and behaviour of the system is characterized by the spectra of the operator. If all eigenvalues lie in the left half of[...]


Our summary: This study focuses on the eigenvalues of operators related to magnetohydrodynamic processes in galaxies. It explores the implications of these eigenvalues on the generation and behavior of galactic magnetic fields. The research employs both analytical and numerical methods to solve the eigenvalue problems associated with these operators.

Eigenvalues, Magnetohydrodynamics, Spectra, Dynamo Theory

Publication

Impact of Magnetohydrodynamics on Thermal Mixing Efficiency and Entropy Generation Analysis Passing Through a Micromixer Using Non-Newtonian Nanofluid

Published on 2025-12-31 by Naas Toufik Tayeb, Youcef Abdellah Ayoub Laouid, Ayache Lakhdar, Telha Mostefa, Sun Min Kim, Shakhawat Hossain @MDPI

Abstract: The present paper investigates the steady laminar flow and thermal mixing performance of non-Newtonian Al2O3 nanofluids within a two-layer cross-channel micromixer, employing three-dimensional numerical simulations to solve the governing equations across a low Reynolds number range (0.1 to 50). It also addresses secondary flows and thermal mixing performance with two distinct inlet temperatures for thin nanofluids. Additionally, it explores how fluid properties and varying concentrations of Al2O[...]


Our summary: This study examines the flow and thermal mixing of non-Newtonian Al2O3 nanofluids in a micromixer using numerical simulations. It analyzes the effects of fluid properties and nanoparticle concentrations on mixing efficiency and entropy generation. Results indicate that magnetohydrodynamics can significantly improve mixing performance by modifying flow dynamics.

Magnetohydrodynamics, Thermal Mixing, Non-Newtonian Nanofluid, Micromixer

Publication

Watching Alkaline Phosphatase Catalysis Through Its Vibrational Fingerprint

Published on 2025-12-30 by Margherita Tamagnini, Haoyue Jiang, Liana Klivansky, Carlos Bustamante, Alessandra Lanzara @MDPI

Abstract: Despite decades of structural and kinetic characterization, the full spectral molecular vibrations that accompany the catalysis in alkaline phosphatase (ALP) have remained largely unexplored. In this study, we combine in situ real-time attenuated total reflection Fourier transform infrared (ATR-FTIR) measurements over a large energy range to track the hydrolysis of p-nitrophenyl phosphate (PNPP) and inorganic phosphate (Pi) over a large range of enzyme concentrations. From the static spectra of [...]


Our summary: This study explores the vibrational fingerprints of alkaline phosphatase during catalysis. It employs in situ ATR-FTIR measurements to track the hydrolysis of substrates in real-time. The findings reveal significant spectral shifts that provide insights into the enzymatic reaction dynamics.

Alkaline Phosphatase, ATR-FTIR, Vibrational Spectroscopy, Catalysis

Publication

Halide perovskite nanocrystal particles, emitters, manufacturing method thereof

Patent published on the 2025-12-11 in US under Ref US2025376621 by SEOUL NATIONAL UNIV R&DB FOUNDATION [KR] (Lee Tae-woo [kr], Jang Kyung Yeon [kr])

Abstract: The present invention relates to halide perovskite nanocrystal particles, emitters, and a method of manufacturing the same. The halide perovskite nanocrystal particles according to the present invention have improved emission characteristics such as emission intensity and photoluminescence quantum efficiency by removing surface defects and have improved electrical characteristics, and at the same time, damage and size increases of the nanocrystal are suppressed. In addition, the halide perovskit[...]


Our summary: The invention focuses on halide perovskite nanocrystal particles with enhanced emission characteristics. It describes a method that improves emission intensity and quantum efficiency while suppressing damage. The emitters achieve excellent color purity and deep blue emission spectrum.

Halide perovskite, nanocrystal, emitters, manufacturing

Patent

取り上げるトピック: 天体物理学、中性子星、超新星、ブラックホール、宇宙マイクロ波背景放射、CMBR、クエーサー、赤方偏移、降着円盤、暗黒物質、宇宙インフレーション、磁気流体力学、暗黒エネルギー、ハッブル、事象の地平線、重力波、系外惑星、赤色巨星、白色矮星、赤方偏移、ISO 21348、ISO 19115、ISO 19130、ISO 19111、およびISO 19115-1。

歴史的背景

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(日付が不明または関連性がない場合、例えば「流体力学」などでは、その注目すべき出現時期の概算値が提示されます。)

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